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determined by Eq. 1.14.16, and

r = r(L) = (rObs + L2 + 2^LAaJP, A0 = 0 - 0,bs, (1-14.23)

0 = a(l) = Aobs + arceos^ + ^sLA ^ robs fobs + l2 + 2robsLA0}/2 ^^,(1-14-

AA- arcsin

V ro

/sin AA

Let us consider the spherically symmetric case. For the spherically symmetric problem for observation at a distance robs in the direction determined by the angle p between direction of observation and the direction to the Sun, on the basis of Eq. 1.14.21-1.14.25 we obtain robs,p, t )= 1.45^ (() (()/nQ ) (robs,p, b, a(ey, t)/ (1.14.26)

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